Recent questions tagged JAVA

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java - How to use conditions in breakpoints in idea?

I have tried this back and forth for a longer time, but somehow it does not work. I have also tried with ... these only stops at specific times. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I start the JFileChooser in the Details view?

I would like my JFileChooser to start in details view, instead of the "List" view that it starts in. How do you do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Set Method of ArrayList throwing IndexOutOfBoundsException

While working on ArrayList, I found after setting the initial size of array using the constructor with initialCapacity ... is causing problem ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Scope of do-while loop?

In Java, the body of a do-while loop and the loop condition do not belong to the same scope. So the ... really curious. Thanks for any inputs! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android Canvas locking throws IllegalArgumentException

I am trying to implement my own custom SurfaceView that, when touched, draws a circle at the point where ... Help would be greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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367 views

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java - Which one is recommended: Instant.now().toEpochMilli() or System.currentTimeMillis()

In Java, we can have many different ways to get the current timestamp, but which one is recommended: ... () or System.currentTimeMillis() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Invalid header signature; IOException with Apache POI on excel document

I'm getting: java.io.IOException: Invalid header signature; read 0x000201060000FFFE, expected 0xE11AB1A1E011CFD0 when ... greatly appreciated :) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to get offline token and refresh token and auto-refresh access to Google API

I'm developing an app that accesses Google APIs (starting with Calendar API) using OAuth2 and the google client ... the Google API Console also? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What happens to "System.out.println()" in executable jar?

Suppose I've created an executable jar from a code where I have used System.out.println() When we run the ... no console? Or anything... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Webdriver - How to check if browser still exists or still open?

I want to check if browser still exists and if it isn't then i want to open a new browser! Is there a ... to check if the browser still exists? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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231 views

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java - Find all the indexes of an item within a list using stream API

I am trying sequential search using Java 8 streams and lambda expressions. Here is my code List<Integer> list = ... I print all the indexes? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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235 views

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java - ANTLR not throwing errors on invalid input

I'm using ANTLR to parse logical expressions in a Java tool I'm writing, and I'm having issues because ... all possible exceptions are thrown. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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118 views

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java - Converting a String that contains decimal to Long

I have following sample (link to ideone). long lDurationMillis = 0; lDurationMillis = Long.parseLong("30000.1"); ... is there any other way ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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187 views

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java - How do I insert values into a Map<K, V>?

I am trying to create a map of strings to strings. Below is what I've tried but neither method works. What's wrong ... "John", "Taxi Driver"); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to disable back button pressed in android fragment class

I want to disable the back button in a fragment class. onBackPressed() doesn't seem to work in this fragment. ... void onBackPressed() { } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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949 views

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java - Classes cannot be accessed from outside package

I have two packages. The class I want to import from the first package is declared as PUBLIC. Despite, when I ... { public PUBLICclass() { } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Error inflating class info.hoang8f.widget.FButton

Error Log: 10-26 12:22:33.144 26926-26926/? E/AndroidRuntime: FATAL EXCEPTION: main Process: ksmk.sahip ... ): error 0x3004 (EGL_BAD_ATTRIBUTE) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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167 views

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java - Implement search filter with conditions

I want to implement search functionality with several sub conditions. I tried this: @GetMapping("find") public Page< ... to send these values? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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247 views

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java - custom round skin gui

In looking for a starting place to how to create a round interface. I have tried looking into the docs and tried ... on wants a round gui skin. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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323 views

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java - why my code "Bouncing ball" doesn't work?

I'm trying to write a code a bout a bouncing ball, but i'm stuck in how to make the ball bounced. The code seems ... e) { repaint(); } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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231 views

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java - generics and inheritance question

I have three classes: public abstract class fileHandler<Key extends Object, Value extends Object> { } public ... ) should be parameterized. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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109 views

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java - Can we make one Layout type for all screen size

I developed apps using multiple layouts types for different screens types and resolutions but I have notices that ... -mdpi layout-xlarge-xhdpi See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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199 views

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java - Change JButton focus area

How do i change the area of focus on a JButton so that when i hover my cursor over the button my costume ... is over the actual button itself. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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384 views

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java - WARN/ActivityManager(78): Launch timeout has expired, giving up wake lock! -> what is this

As the title indicates i get this "error" when running my little app: WARN/ActivityManager(78): Launch timeout has ... posted some of my code? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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121 views

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java - How to convert the code to use CompletableFuture?

I used to have a callable class class SampleTask implements Callable<Double> { @Override public Double call( ... SampleTask conforms to Supplier See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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212 views

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java - Storing message into R,G,B instead of Alpha

How to change it to store message into least significant bit of R,G,B. The code below only embed message into Alpha ... = toggle; } return n; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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261 views

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java - com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: error in SQL syntax

If I run my main class, I get this error: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an ... ; return executeUpdate(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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155 views

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java - Gravity with predetermined destination

I am using gravity in a 2d environment for my game. The objects I use in my game all have x and y ... the right formula, but not exactly it See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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